Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a631cad5fed1c55…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 08:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17fed4ef8829fa682a795153f4b4d2d SHA-1: 5308c3b52a7bd1ab258b96baded146aa1b55f3ae SHA-256: 2a631cad5fed1c551e9bf4fcbcf87370aeaf9307250113b29a071be265aaf8de
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=cowboy+bebop+tank+clarinet+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0435/2576/7320/files/pabumatoxoros.pdf'. The document body, though heavily obfuscated, contains references to sheet music and the malicious URL, suggesting a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cowboy+bebop+tank+clarinet+sheet+music
    • http://files.wildaboutwampum.com/uploads/1/3/2/6/132695575/6941230.pdf
    • http://files.visitwhidbeytoday.com/uploads/1/3/1/3/131383325/4225114.pdf
    • http://files.mindregard.com/uploads/1/3/2/6/132695575/8877364.pdf
    • http://kuzogogu.independanceproject.org/uploads/1/3/0/8/130814328/juronegewezibokuzore.pdf
    • http://files.lindaswannpaintings.com/uploads/1/3/0/9/130969389/nerakekivurilex_xinoxuwezete_poliwe_kulopos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/pabumatoxoros.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2806/files/solving_radical_equations_algebra_2_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/61206903412.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/vigesuralutajofobolefapiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/nogezunamadikevepowogefos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/analytical_biochemistry.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ee.bin
a02e7a75d4612475f17c731357d568f4b0743ae8d6c3f23915e03834349824b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EE 5476 bytes
font_01_sfnt_off00006371.bin
c5e476abb41a92910811bdf9c71796bfb4c430886e1d636effc26e9685998687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 14488 bytes

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